Chisel-bar.



R.P.PENROD CHISEL BAR.

APPLICATION FILED NOV.17,'1909.

Patented 0011.4,1910.

M TD.R

His ATT R g ROBERT P. PENROD, OF PITCAIRN BOROUGH, PENNSYLVANIA.

CHISEL-BAR.

To all whom it may concern:

Be it known that I, ROBERT P. PENROD, a citizen of the United States,and residing in the borough of Pitcairn, in the county of Allegheny andState of Pennsylvania, have invented or discovered new and usefulImprovements in Chisel-Bars, of which the following is a specification.

My invention consists in certain new and useful improvements inchisel-bars and similar tools.

In the use of chisel-bars and other cutting tools, the head of a rivetor other piece of the material being severed, when separated, tends tofly, frequently striking the workman in the face and causing seriousinjury.

My invention, generally speaking, consists in a shield, preferablyconcaved or spoonshaped, mounted on the bar adjacent to its cutting endin such a manner that it may at the proper time be thrown into operativeposition to catch the flying pieces and prevent their doing injury. Theshield is pivotally or otherwise supported so as to be readily throwninto or out of position and is normally retained in its inoperativeposition by means of a spring or other suitable device. Means areprovided for the control of the shield adjacent to the hand by which theoperator holds the ohisel-bar in position, and means are also providedto take up slack so that the response of the shield to the actuatingmeans is at all times prompt and positive.

In the accompanying drawings, Figure 1 is a side elevation of achisel-bar provided with my invention, showing the shield in itsinoperative position; Fig. 2 is a similar view showing the shield in itsoperative position; Fig. 3 is a plan view, and Fig. 4c is an enlargeddetail perspective View of the shield.

The following is a detailed description of the drawings.

1 is a chisel-bar provided with the usual cutting edge 2. j

3 is va plate secured to the face of bar 1 adjacent to its cutting edgeby any convenient means, such as set screws 4;4. The

ends of plate 3 are provided with angular projections which seat innotches 5-5 in the chisel-bar to prevent longitudinal movement of theplate 3.

6 is a bifurcated standard, integral with or rigidly secured to the bar1.

Specification of Letters Patent.

Application filed November 17, 1909.

Patented Oct. 4, 1910.

Serial No. 528,472.

7 is the shank of the shield pivoted within standard 6.

8 is the spoon-shaped shield attached to shank 7 or integral therewith.The other end of shank 7 is bent downwardly toward the bar 1, as at 9,and connected by rod 10, preferably provided with a. turn-buckle 11 toadjust the same, to the short outwardly extending arm 12 of lever 13,which lever is pivoted at its angle within the bifurcated standard 14Erigidly mounted on bar 1. The long arm 15 of the lever 13 extends alongthe bar 1 but normally spaced away therefrom.

16 is a spring interposed between the arm 15 and the bar 1 to normallymaintain the shield 8 in its retracted or inoperative position.

When the article being cut is about severed, the operator grasps the arm15 with the hand which holds the end of the bar and draws said arminwardly toward the bar thus throwing the shield into its operativeposition to catch the flying fragments. l/Vhen the arm 15 is released,the shield resumes its inoperative position through the influence ofspring 16.

It is evident that my invention provides an effective and much needed.safety attachment for chisel-bars and cutting tools in general, doingaway with accidents frequent in boiler, machine and other shops.

lVhat I desire to claim is 1. In a tool of the character described, aswinging shield mounted on said tool adjacent to its cutting end, andmeans operated from the handle end of the tool for throwing said shieldinto its operative position.

2. In a tool of the character described, a swinging shield mounted onsaid tool adjacent to its cutting end, means for normally maintainingsaid shield in its inoperative position, and means operated from thehandle end of the tool for throwing said shield into its operativeposition.

3. In a tool of the character described, a swinging spoon-shaped shieldmounted on the tool adjacent to its cutting end and adapted to be throwninto proximity with said cutting end to intercept flying fragments, andmeans operated from the handle end of the tool for throwing the shieldinto its operative posit-ion.

4. In a tool of the character described, a swinging spoon-shaped shieldmounted on the tool adjacent to its cutting end and adapted to be throwninto proximity with Signed at Pittsburg, PgL, this 15th day of saidcutting end to intercept flying frag- Vow/ember 1909.

1ne nts, rne 21ns for normally rnnlntalnlng sand ROBERT PENROD shleld 1nlts 1noperatlve posltlon, and means operated from the handle end of thetool for Vitnesses:

throwmg the slneld Into 1ts operative posi- EDWARD A. LAWPENQ tion. J.H. HARRISON.

